... .Round pipe 2.Square pipe 3.Rectangular pipe 4.Oval pipe 5.Welded pipe 1.Our products are as following:(Unit:mm)Round pipe:Dia. ... 20,Dia.22.2,Dia.25.4,Dia.32,Dia.38,Dia.44.5,Dia.48, ... .50.8,Dia.57,Dia.63.5,Dia.76,Dia.83,Dia.89Square pipe:16X16,19X19,20X20,22.2X22.2, ... ,40X40,45X45,50X50,60X60,70X70and other rectangular or oval pipe of the same specifications. Thickness from 0.85mm to ...